Screening device.



No. 650,034. Patented May 22, I900.

w. CARKEEK.

SCREENING DEVICE.

(Application filed Nov. 10, 1899.)

(No Model.) 2 Sheets-Sheet witnma/ ALD/M ruz- NuRms PEYERS co. PHOTO-LITNQ. wnsnmm'on, a c.

(No Model.)

' Patented May 22; I900. W. CARKEEK.

SCREENING DEVICE.

(Application filed Nov. 10, 1899.)

2 Sheets-Sheet 2.

gNITE STATES PATENT OFFICE WILLIAM CARKEEK, OF BUTTE, MONTANA, ASSIGNOR OF TTVO-TI-IIRDS TO JOHN CARKEEK AND PHILIP YVISEMAN, OF SAME PLACE.

SCREENING DEVICE.

SPECIFICATION forming part of Letters Patent No. 650,034, dated May 22, 1900. Application filed November 10, 1899. Serial No. 736,512. (No model.)

To all whm'rt it may concern:

Be it known that I, WILLIAM OARKEEK, a citizen of the United States, residing at Butte, in the county of Silverbow and State of Montana, have invented certain new and useful Improvements in Screenin g Devices, of which the following is a specification.

This invention relates to apparatus for screening ore, tailings, or similar substances, and is especiallyadapted for screening by what is known as the wet process.

The object of the invention is to provide an improved apparatus for this purpose whereby the screening will be accomplished in a better and more expeditious manner.

The invention will be fully described hereinafter, reference being had to the accompanying drawings, in which Figure 1 is a vertical longitudinal section of a screening apparatus constructed in accordance with my invention. Fig. 2 is an end View, partly in section and partly broken away. Fig. 3 is an end View showinga modification.

A represents a feed-box supported in any suitable manner to discharge into the end of a pipe 13. This pipe is supported at any desired inclination in suitable bearings b b to rotate therein and is provided with a pulley c, by means of which it may be driven from any source of power. (Not shown.) The end of the pipe B remote from the feed-box will be closed, preferably,- by a removable cap or plug a. At intervals in the pipe B holes are bored into which short pieces of pipe d are screwed, such pipes forming dischargenipples. The pipes or nipples at will be of such number and size that the combined areas of their discharge-openings will exceed the cross-sectional area of the pipe B, and preferably they will be arranged spirally around the pipe B.

E is a cylindrical screen supported at any desired inclination around the pipe B and of such length that all the nipples d are within it, while the pipe B extends beyond it at each end. This screen may be stationary, or it may be supported to have rotary movement in either direction, but preferablyin a direction reverse to that in which the pipe 13 is rotated. I

is supported upon suitable framework G.

The rings F may be made of channel-iron of suflicient depth that the sides 2 thereof may overlap the edges of the bands 6, and thus prevent to a considerable extent the access of grit to the rollers.

Some means must be provided to positively rotate the screen, and as an illustration I have shown the screen E provided with a band H intermediate its ends,such bands hav ing gear teeth h, which mesh with the teeth of a pinion z, carried bya shaft 1, adapted to be driven from any suitable source of power. (Not shown.) Any other means may be em ployed to positively rotate the cylinder E, and it may be otherwise supported to permit such rotary movement, the means shown being merely illustrative of one way in which the rotation may be effected. The essential thing is that the screen shall be driven independently of the pipe 13, and preferably the rota tion of the screen will be slower than that of the pipe and in the opposite direction.

An outer casing J will be provided around the screen E, the lower portion of which will be in the form of a hopper j, from which a delivery-chute 7c may lead and through which the screened ore will be discharged. The upper portion of the casing will be provided with an opening Z, through which the pinion twill project. The casing J may be supported in any suitable manner and may be in sections to permit it to be easily removed when necessary.

A receptacle M is provided into which the material which is over size or too large to pass through the meshes of the screen will be delivered from the end of the screen remote from the feed-box A. This oversize mate rial can be again crushed or otherwise dis posed of.

Sometimes it may be preferable to have the screen E stationary, and one way of thus supporting it is shown in Fig. 3, where it will be seen that the bande onthe screen is clamped-C between .thetwogsections of a flat ring O, the

lower section being bolted to the framework G and the upper section 0 being detachably connected to the section 0 by the bolts 10.

In operation. the .crushed ore mixed with. Water-will "be ied into the boxA; frornwhence';

it will pass into the pipe B. The latter being rapidly rotated, the centrifugal force will to drive the mixed ore and water out through the nipples d and against the screen and the fin e ore and water will pass through the-- screen within. the,casing-landfall. intoethe'. hopper j, while the oversizematerial willbe I 5 discharged from the lower end of theiinclined screeninto the receptacle M. If, in addition, th'GlSGlGOllbOzfllSQI rotated; the screening action gwillf be -fztcilitated and the screen-will notberasliable-toiclog up. Further, the'tu-ms 2o. -blinggactionwhich:will thus be. impartedetm the ;oversize-material will aid in preventing;

the-rscreenrfrom clogging an d will also facili tate.-;thedischarge of-tl-ic oversize material" fromgthe screen. 1 .1'; I 'doinot'limit my invention to the specific detailsjsof construction illustratedfland" de-- scrib'ed,ias they :may be varied or modified in many particulars; but,

Having described the invention, I-clai 1n.-' 3off- In-.a-=screening; apparatus foivore, &c.:,

' the :combinati'onwith .a cylindrical screen supported at an inclination, of a pipeextend inglongitudinally,through-said-screen to have rotary movement and. having ;its..zlower end closed, a series of discharge-nipples arranged circumferentially around the pipe within the screen, means to rotate the pipe, means to introduce the.ore..to the. pipe at its. highest. end: a a ing. nc in ;.gt "*scr n" into whioh thescreened material is delivered, and a receptacle at the lower end of the screen into which the oversize material is discharged from the screen, substantially as set forth.

-- -2. In a screening apparatus for ore, &c., the. combination with. a .cy1indrical...screen supported at an inclination, of a pipe extending longitudinally through said screen to have rotary movement and having itslower end closed, a series of discharge-nipples arranged circumferentiallyaround the pipe'within the screen, a casing inclosi-ng the screen into which? the-material passesthroughthe screen, :mi'eanstofeed therore tothe pi-pe'atitehighestend, a means to rotatc-thepipe,and means, to rotate the screen independen tlyofthe pipe, substantially as set forth.

In testimony whereof I havesigned name to thisspecification inthe presence of two subscribing witnesses.

WIL IAM oARnnErc lV-itn'esses:

E. F. KILMER, WILLIAM THOMPSON; 

